From Surf Wiki (app.surf) — the open knowledge base

TZ Cassiopeiae

Star in the constellation Cassiopeia

| b-v = +2.57 | u-b = +2.43

TZ Cassiopeiae (TZ Cas, HIP 117763, SAO 20912) is a variable star in the constellation Cassiopeia with an apparent magnitude of around +9 to +10. It is approximately 8,400 light-years away from Earth. The star is a red supergiant star with a spectral type of M3 and a temperature around .

TZ Cassiopeiae was reported as being variable by Williamina Fleming and published posthumously in 1911. It is a slow irregular variable star with a possible period of 3,100 days. It is irradiating over 68,500 times the luminosity of the Sun, and it is 640 times larger than the Sun.

The initial mass of TZ Cassiopeiae has been estimated from its position relative to theoretical stellar evolutionary tracks to be around .

TZ Cas is losing mass through a powerful stellar wind at two millionths of a solar mass each year. It is unclear whether this is sufficient to cause the star to lose its atmosphere and become a blue supergiant before the core exhausts its fuel and collapses as a supernova. Either as a red or blue supergiant, or a Wolf–Rayet star, it will inevitably end its life violently in a supernova explosion when the core collapse occurs.

References

(May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters.
(2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues.
(2011). "Studies of "Irregularity" in Pulsating Red Giants. III. Many More Stars, an Overview, and Some Conclusions". The Journal of the American Association of Variable Star Observers.
(1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series.
(2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics.
{{cite Gaia EDR3. 2011915724030139136
(2005). "The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not as Cool as We Thought". The Astrophysical Journal.
(August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics.
(1911). "Stars Having Peculiar Spectra. 31 New Variable Stars". Harvard College Observatory Circular.
(2006). "Variability in red supergiant stars: Pulsations, long secondary periods and convection noise". Monthly Notices of the Royal Astronomical Society.
(1978). "Studies of luminous stars in nearby galaxies. I. Supergiants and O stars in the Milky Way". Astrophysical Journal.
(2007). "Atmospheric dynamics and the mass loss process in red supergiant stars". Astronomy and Astrophysics.
(2010). "The mass-loss rates of red supergiants and the de Jager prescription". Astronomy & Astrophysics.
(2015). "Impact of mass-loss on the evolution and pre-supernova properties of red supergiants". Astronomy & Astrophysics.
"Hipparcos Tools Interactive Data Access". ESA.

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

cassiopeia-(constellation) slow-irregular-variables m-type-supergiants objects-with-variable-star-designations hipparcos-objects durchmusterung-objects astronomical-objects-discovered-in-1911 discoveries-by-williamina-fleming

Want to explore this topic further?

Ask Mako anything about TZ Cassiopeiae — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report